Resolving dependencies...
Configuring ObjectName-1.1.0.1...
Configuring fixed-0.2.1.1...
Building ObjectName-1.1.0.1...
Building fixed-0.2.1.1...
Installed ObjectName-1.1.0.1
Configuring half-0.2.2.3...
Configuring stm-2.4.4.1...
Installed fixed-0.2.1.1
Building half-0.2.2.3...
Building stm-2.4.4.1...
Configuring text-1.2.2.1...
Installed half-0.2.2.3
Building text-1.2.2.1...
Configuring transformers-compat-0.5.1.4...
Installed stm-2.4.4.1
Building transformers-compat-0.5.1.4...
Configuring StateVar-1.1.0.4...
Installed transformers-compat-0.5.1.4
Building StateVar-1.1.0.4...
Configuring transformers-base-0.4.4...
Installed StateVar-1.1.0.4
Building transformers-base-0.4.4...
Installed transformers-base-0.4.4
Configuring elerea-2.9.0...
Building elerea-2.9.0...
Installed elerea-2.9.0
Installed text-1.2.2.1
Configuring OpenGLRaw-3.2.4.0...
Building OpenGLRaw-3.2.4.0...
Installed OpenGLRaw-3.2.4.0
Configuring GLURaw-2.0.0.3...
Building GLURaw-2.0.0.3...
Installed GLURaw-2.0.0.3
Configuring OpenGL-3.0.1.0...
Building OpenGL-3.0.1.0...
Installed OpenGL-3.0.1.0
Configuring GLFW-0.5.2.5...
Building GLFW-0.5.2.5...
Installed GLFW-0.5.2.5
Configuring elerea-examples-2.2.1...
Building elerea-examples-2.2.1...
Failed to install elerea-examples-2.2.1
Build log ( /home/builder/.cabal/logs/elerea-examples-2.2.1.log ):
cabal: Entering directory '/tmp/cabal-tmp-4986/elerea-examples-2.2.1'
Configuring elerea-examples-2.2.1...
Building elerea-examples-2.2.1...
Preprocessing executable 'elerea-bounce' for elerea-examples-2.2.1...
[1 of 5] Compiling Vector           ( src/Bounce/Vector.hs, dist/build/elerea-bounce/elerea-bounce-tmp/Vector.o )
[2 of 5] Compiling Util             ( src/Bounce/Util.hs, dist/build/elerea-bounce/elerea-bounce-tmp/Util.o )
[3 of 5] Compiling Math             ( src/Bounce/Math.hs, dist/build/elerea-bounce/elerea-bounce-tmp/Math.o )

src/Bounce/Math.hs:53:10: error:
    • Could not deduce (Eq a) arising from a use of ‘scanM’
      from the context: Fractional a
        bound by the type signature for:
                   movingAvg :: Fractional a =>
                                a -> Signal a -> SignalGen p (Signal a)
        at src/Bounce/Math.hs:51:1-70
      Possible fix:
        add (Eq a) to the context of
          the type signature for:
            movingAvg :: Fractional a =>
                         a -> Signal a -> SignalGen p (Signal a)
    • In a stmt of a 'do' block: sig <- scanM n (delay 0) s
      In the expression:
        do { sig <- scanM n (delay 0) s;
             return $ ((/ n) . sum) <$> sequence sig }
      In an equation for ‘movingAvg’:
          movingAvg n s
            = do { sig <- scanM n (delay 0) s;
                   return $ ((/ n) . sum) <$> sequence sig }

src/Bounce/Math.hs:59:10: error:
    • Could not deduce (Eq c) arising from a use of ‘scanM’
      from the context: (Vector2D v c, Num c)
        bound by the type signature for:
                   movingAvgV :: (Vector2D v c, Num c) =>
                                 c -> Signal v -> SignalGen p (Signal v)
        at src/Bounce/Math.hs:57:1-78
      Possible fix:
        add (Eq c) to the context of
          the type signature for:
            movingAvgV :: (Vector2D v c, Num c) =>
                          c -> Signal v -> SignalGen p (Signal v)
    • In a stmt of a 'do' block: sig <- scanM n (delay vnull) s
      In the expression:
        do { sig <- scanM n (delay vnull) s;
             return $ ((^/. n) . foldl1' (^+^)) <$> sequence sig }
      In an equation for ‘movingAvgV’:
          movingAvgV n s
            = do { sig <- scanM n (delay vnull) s;
                   return $ ((^/. n) . foldl1' (^+^)) <$> sequence sig }
cabal: Leaving directory '/tmp/cabal-tmp-4986/elerea-examples-2.2.1'
cabal: Error: some packages failed to install:
elerea-examples-2.2.1 failed during the building phase. The exception was:
ExitFailure 1